Implement '_pyside6()'.

Qt.py

@@ -1472,6 +1472,50 @@ def _build_compatibility_members(binding, decorators=None):
         setattr(Qt.QtCompat, classname, compat_class)
 
 
+def _pyside6():
+    """Initialise PySide6
+
+    These functions serve to test the existence of a binding
+    along with set it up in such a way that it aligns with
+    the final step; adding members from the original binding
+    to Qt.py
+
+    """
+
+    import PySide6 as module
+    extras = ["QtUiTools"]
+    try:
+        import shiboken6
+        extras.append("shiboken6")
+    except ImportError as e:
+        print("ImportError: %s" % e)
+
+    _setup(module, extras)
+    Qt.__binding_version__ = module.__version__
+
+    if hasattr(Qt, "_shiboken6"):
+        Qt.QtCompat.wrapInstance = _wrapinstance
+        Qt.QtCompat.getCppPointer = _getcpppointer
+        Qt.QtCompat.delete = shiboken6.delete
+
+    if hasattr(Qt, "_QtUiTools"):
+        Qt.QtCompat.loadUi = _loadUi
+
+    if hasattr(Qt, "_QtCore"):
+        Qt.__qt_version__ = Qt._QtCore.qVersion()
+        Qt.QtCompat.dataChanged = (
+            lambda self, topleft, bottomright, roles=None:
+            self.dataChanged.emit(topleft, bottomright, roles or [])
+        )
+
+    if hasattr(Qt, "_QtWidgets"):
+        Qt.QtCompat.setSectionResizeMode = \
+            Qt._QtWidgets.QHeaderView.setSectionResizeMode
+
+    _reassign_misplaced_members("PySide6")
+    _build_compatibility_members("PySide6")
+
+
 def _pyside2():
     """Initialise PySide2